util/src/com/intellij/patterns/NullablePatternCondition.java

   1 /*
   2  * Copyright (c) 2000-2005 by JetBrains s.r.o. All Rights Reserved.
   3  * Use is subject to license terms.
   4  */
   5 package com.intellij.patterns;
   6
   7 import org.jetbrains.annotations.NonNls;
   8 import org.jetbrains.annotations.NotNull;
   9 import org.jetbrains.annotations.Nullable;
  10
  11 /**
  12  * @author peter
  13 */
  14 public abstract class NullablePatternCondition {
  15   public static final NullablePatternCondition TRUE = new NullablePatternCondition() {
  16     public boolean accepts(@Nullable final Object o, final MatchingContext matchingContext, @NotNull final TraverseContext traverseContext) {
  17       return true;
  18     }
  19
  20     public String toString() {
  21       return "";
  22     }
  23   };
  24
  25   public abstract boolean accepts(@Nullable Object o, final MatchingContext matchingContext, @NotNull TraverseContext traverseContext);
  26
  27   @NonNls
  28   public String toString() {
  29     return super.toString();
  30   }
  31 }